> It was only a few weeks ago people were celebrating Amazon's philosophy of if a mistake is made, it's never the individuals fault it's the systems fault. Could we not also perhaps apply this philosophy to safety notices/warnings/education in this tragedy?

It has been established in court that the National Parks System is not required to make National Parks safe (families of dead tourists suing for more fences and safety rails and so on) because an intrinsic part of the value of the parks is exposure to nature without a glass wall in front of it. A few people dying horribly is a price the rest of us are willing to pay for that value.